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Inelastic behavior of sand--lime mortar joint masonry arches

机译:砂灰砂浆砌体拱的非弹性行为

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The response of masonry arch bridges to moving wheel loads was simulated in the laboratory by hanging steel weights from the center of gravity of selected voussoirs of four arches. Elastic and plastic deformations occur in the sand--lime mortar joints, where significant plastic behavior occurs under the first few cycles of loading, then an elastic response follows when the magnitude of load and the load cycles increase. The results from the ultimate load testing show that the collapse load depends significantly on the load history of the arch and that a sliding failure can override a four--hinge mechanism. A model of the arch ring using ADINA and the Drucker--Prager material model indicates that plastic accumulations do not occur after the first load cycle, however, it is believed that sliding occurs between the voussoirs and the mortar, producing small inelastic deformations under moving loads.
机译:在实验室中,通过将钢制砝码悬挂在选定的四个拱形拱顶的重心上,模拟了砌体拱桥对动轮荷载的响应。砂土砂浆接头处发生弹性和塑性变形,在最初的几个载荷循环中会发生明显的塑性行为,然后,当载荷的大小和载荷循环增加时,就会产生弹性响应。极限载荷测试的结果表明,倒塌载荷在很大程度上取决于拱的载荷历史,滑动失效可以覆盖四铰链机构。使用ADINA和Drucker-Prager材料模型建立的拱形环模型表明,在第一个载荷循环之后不会发生塑性积聚,但是,人们认为在Voussoir和砂浆之间会发生滑动,从而在运动过程中产生较小的无弹性变形负载。

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